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<h2><span class="refentrytitle">Using GTK+ on Windows</span></h2>
<p>Using GTK+ on Windows — 
Windows-specific aspects of using GTK+
</p>
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<div class="refsect1">
<a name="id-1.8.6.3"></a><h2>Using GTK+ on Windows</h2>
<p>
The Windows port of GTK+ is an implementation of GDK (and therefore GTK+)
on top of the Win32 API. When compiling GTK+ on Windows, this backend is
the default.
</p>
<div class="refsect2">
<a name="win32-cmdline"></a><h3>Windows-specific commandline options</h3>
<p>
The Windows GDK backend can be influenced with some
additional command line arguments.
</p>
<p><b><code class="systemitem">--sync</code>. </b>
Don't batch GDI requests. This might be a marginally useful option for 
debugging.
</p>
<p><b><code class="systemitem">--no-wintab</code>, 
       <code class="systemitem">--ignore-wintab</code>. </b>
Don't use the Wintab API for tablet support.
</p>
<p><b><code class="systemitem">--use-wintab</code>. </b>
Use the Wintab API for tablet support.  This is the default.
</p>
<p><b><code class="systemitem">--max-colors <em class="replaceable"><code>number</code></em></code>. </b>
In 256 color mode, restrict the size of the color palette to 
the specified number of colors. This option is obsolete.
</p>
</div>
<hr>
<div class="refsect2">
<a name="win32-envar"></a><h3>Windows-specific environment variables</h3>
<p>
The Win32 GDK backend can be influenced with some
additional environment variables.
</p>
<p><b><code class="envar">GDK_IGNORE_WINTAB</code>. </b>
If this variable is set, GTK+ doesn't use 
the Wintab API for tablet support.
</p>
<p><b><code class="envar">GDK_USE_WINTAB</code>. </b>
If this variable is set, GTK+ uses the Wintab API for 
tablet support.  This is the default.
</p>
<p><b><code class="envar">GDK_WIN32_MAX_COLORS</code>. </b>
Specifies the size of the color palette used
in 256 color mode.
</p>
</div>
<hr>
<div class="refsect2">
<a name="win32-cursors"></a><h3>Windows-specific handling of cursors</h3>
<p>
By default the "system" cursor theme is used. This makes GTK prefer cursors
that Windows currently uses, falling back to Adwaita cursors and (as the last
resort) built-in X cursors.
</p>
<p>
When any other cursor theme is used, GTK will prefer cursors from that theme,
falling back to Windows cursors and built-in X cursors.
</p>
<p>
Theme can be changed by setting <code class="literal">gtk-cursor-theme-name</code> GTK+ setting. Users can override GTK+ settings in the <code class="filename">settings.ini</code> file or at runtime in the GTK+ Inspector.
</p>
<p>
Themes are loaded from normal Windows variants of the XDG locations:
<code class="filename">%HOME%/icons/THEME/cursors</code>, 
<code class="filename">%APPDATA%/icons/THEME/cursors</code>, 
<code class="filename">RUNTIME_PREFIX/share/icons/THEME/cursors</code>.
</p>
<p>
The <code class="literal">gtk-cursor-theme-size</code> setting is ignored, GTK will use the cursor size that Windows tells it to use.
</p>
</div>
<p>
More information about GTK+ on Windows, including detailed build
instructions, binary downloads, etc, can be found
<a class="ulink" href="https://wiki.gnome.org/Projects/GTK+/Win32" target="_top">online</a>.
</p>
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